Balance Sheet Components - (Tables)

12 Months Ended

Dec. 31, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Property and Equipment, Net

Useful lives for property and equipment are as follows:

Property and Equipment	Estimated Useful Life
Furniture and fixtures	3 years
Product tooling equipment	2 years
Computers equipment and software	3 years
Capitalized internal-use software	3 years
Leasehold improvements	Lesser of estimated useful life or remaining lease term

Property and equipment consisted of the following:

	As of December 31,
	2019			2018
	(in thousands)
Computer, equipment and software	$	2,218		$	652
Furniture and fixtures	915			730
Capitalized internal-use software	11,229			5,653
Leasehold improvements	1,092			585
Property and equipment	15,454			7,620
Less: accumulated depreciation	(5,100		)	(1,783		)
Property and equipment, net	$	10,354		$	5,837

Schedule of Intangible Assets, Net

	Useful Life
	(in years)
Customer relationships	7–10
Developed technology	5–7
Trade names	2–5

Intangible assets consisted of the following as of December 31, 2019:

	Gross Value		Accumulated Amortization			Net Book Value		Weighted- Average Remaining Useful Life
	(in thousands)							(years)
Customer relationships	$	8,190	$	(1,227	)	$	6,963	7.1
Developed technology	11,020		(1,848		)	9,172		5.7
Trade name	448		(114		)	334		4.0
Total	$	19,658	$	(3,189	)	$	16,469

Intangible assets consisted of the following as of December 31, 2018:

	Gross Value		Accumulated Amortization			Net Book Value		Weighted- Average Remaining Useful Life
	(in thousands)							(years)
Customer relationships	$	3,890	$	(266	)	$	3,624	9.3
Developed technology	1,820		(329		)	1,491		4.3
Trade names	48		(9		)	39		1.4
Total	$	5,758	$	(604	)	$	5,154

Finite-lived Intangible Assets Amortization Expense

Amortization expense for intangible assets for years ended December 31, 2019, 2018 and 2017 is as follows:

	Year Ended December 31,
	2019		2018		2017
	(in thousands)
Customer relationships	$	920	$	266	$	—
Developed technology	1,569		318		11
Trade names	96		8		1
Total	$	2,585	$	592	$	12

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

The expected future amortization expense related to intangible assets as of December 31, 2019 is as follows:

	Amount
	(in thousands)
2020	$	2,769
2021	2,762
2022	2,750
2023	2,494
2024	2,324
Thereafter	3,370
Total	$	16,469

Schedule of Goodwill

Goodwill consisted of the following:

	Amount
	(in thousands)
Beginning balance as of December 31, 2017	$	2,486
Goodwill from acquisition (Note 4)	13,223
Beginning balance as of December 31, 2018	15,709
Goodwill from acquisition (Note 4)	20,092
Ending balance as of December 31, 2019	$	35,801

Schedule of Prepaid Expenses and Other Current Assets

Prepaid expenses and other current assets consisted of the following:

	As of December 31,
	2019		2018
	(in thousands)
Prepaid expenses	$	3,284	$	2,059
Prepaid Insurance	2,459		25
Escrow deposit, current	2,100		1,750
Prepaid commissions	948		—
Interest receivable	504		—
Prepaid rent	352		227
Short-term deposits	201		718
Other current assets	12		156
Total	$	9,860	$	4,935

Schedule of Noncurrent Other Assets

Other noncurrent assets consisted of the following:

	As of December 31,
	2019		2018
	(in thousands)
Escrow deposit, noncurrent	$	3,150	$	5,250
Other	310		235
Total	$	3,460	$	5,485

Schedule of Accrued Liabilities and Other Current Liabilities

Accrued expenses and other current liabilities consisted of the following:

	As of December 31,
	2019		2018
	(in thousands)
Accrued bonus	$	8,652	$	5,857
Vendor accruals	3,984		1,574
Accrued commissions	2,611		1,470
Contingent consideration, current	3,004		1,316
Accrued payroll and employee benefits	2,291		1,447
Employee contribution to ESPP	1,805		—
Accrued rebates	1,152		609
Accrued sales and use taxes	932		1,887
Accrued professional services	782		295
Accrued offering expenses	286		—
Other accrued expenses	2,302		1,697
Total	$	27,801	$	16,152